Jane Goodall

Well, at least in that part of, it was before it became a park, actually.

And so it was very, very important to keep Grubb, as we called him, away from the chimps and to always have someone with him.

And that was why, while he was sort of two and three years,

I actually spent much, much less time at Gombe and more time with Hugo, my ex-husband, on the Serengeti, which was a sort of healthier and safer environment for a small toddling child.

It was very disturbing to think that these wonderful chimpanzees might harm my baby, my precious baby.

Because up until that time, I had thought that although chimps were very like us in so many ways, that they were rather nicer.

And it was even more shocking to find, and this was when my son was already about five years old, to find that they were capable of extreme brutality, of cannibalism, and of a behavior that's very similar to primitive human warfare.

We believe that the really serious attacks on members of a neighboring community are due to a sort of territorial dispute.

We find that they're very aggressively territorial and that groups of males will patrol the boundaries of their territory.

And they appear to be searching for sight or sound of neighbors.

And that the males of a community, any number from four to ten, depending on the size of the community at the time, will actually...

enlarge their territory at the expense of a weaker neighbor.

So it's not only protecting their territory for their females and young, but an act of warfare almost, to increase their own territory.

We had one period at Gombe, which was I think the darkest period in Gombe's history,

which we refer to as the Four Year War.

And it happened after the main study group had divided.

And there was a period when there was a sort of no man's land between the two communities, newly established rangers.

And then the males of the larger community, the Kasakela community, began going on raids into the heart of the land that had been taken over by the splinter group that moved off to the south.

And if they encountered an individual on his or her own, they would give chase.

It was almost like a hunt.